Drug interactions
Omega + Warfarin
Severity: Moderate
Omega and Warfarin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Omega-3 fatty acids have mild antiplatelet effects and, at high doses, may slightly increase bleeding tendency with warfarin. Most studies show little change in INR at usual doses.
What this interaction means in plain words
Omega and Warfarin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive effect on hemostasis: platelet inhibition by omega-3 alongside vitamin K-dependent clotting factor reduction by warfarin.
What to do
Check INR when starting, stopping or changing the omega-3 dose, and watch for bleeding. Avoid high-dose products unless clearly indicated.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Warfarin
- Defibrotide + Warfarin Contraindicated
- Ketorolac + Warfarin Contraindicated
- Abciximab + Warfarin Major
- Acetylsalicylic acid + Warfarin Major
- Adagrasib + Warfarin Major
- Amiodarone + Warfarin Major
Frequently asked questions
Can I take Omega with Warfarin?
MediHelp rates the interaction as moderate. Omega and Warfarin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Omega-3 fatty acids have mild antiplatelet effects and, at high doses, may slightly increase bleeding tendency with warfarin. Most studies show little change in INR at usual doses.
How serious is the interaction between Omega and Warfarin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check INR when starting, stopping or changing the omega-3 dose, and watch for bleeding. Avoid high-dose products unless clearly indicated.
What other medicines interact with Warfarin?
MediHelp also lists interactions of Warfarin with, for example, Defibrotide, Ketorolac, Abciximab. The full list is on the Warfarin page.
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